Convertible chair.



H. A. BRITTON.

CONVERTIBLE CHAIR.

APPLICATION FILED JAN. 18. 1909 Patented June 22, 1909.

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CONVERTIBLE CHAIR.

APPLICATION FILED JAN.18.1909.

925,558., Patented June 22, 1909.

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CONVERTIBLE CHAIR.

Specification of Letters Patent.

Patented June 22, 1909.

Application filed January 18, 1909. Serial No. 472,875.

To all whom it may concern:

Be it known that I, HARVEY A. BRITTON, a citizen of the United States, residing at Springfield, in the county of Sangamon and State of Illinois, have invented certain new and useful Improvements in Convertible Chairs, of which the following is such a full, clear, and exact description as will enable others skilled in the art to make and use my said invention.

This invention relates to convertible chairs of the mission order.

The purpose is to provide a chair, of the order named, so constructed and arranged that it will serve as a high chair and may be readily changed to serve as a study or office chair without impairing the mission eilect.

The invention consists in the novel features of construction and combinations, of

parts shown in the annexed drawings, to"

which reference is hereby made, and hereinafter particularlydescribed and finally recited in the claim.

Figure 1 is a side elevation of the chair arrhnged for use as a high chair. Fig. 2 is a bottom plan of the chair. Fig. 3 is a vertical section on the line X. X. of Fig. 1. Fig. 4 is a side elevation of the chair arranged for use as a study vor oilice chair. Fig. 5 is an enlarged partial isometric view and horizontal section on the line Y. Y. of Fig. 3. Fig. 6 is an enlarged vertical section on the line Z. Z. of Fig. 4. Fi 7 is an enlarged horizontal section on the e W. W. of Fig. 1, and Fig. '8 is an enlarged horizontal section on the lineV. V. of Fig. 3.

The same reference numerals and characters designate the same parts in all of the views.

By reason of the peculiar construction of the chair, small pieces of lumber, which might otherwise go to waste, may be advantageousl used in its manufacture, thereby materia y reducing the first cost ofthe chair. The base 1 and seat 2 are cut out of a board or boards of suitable dimensions. The pedestal comprises an upper section 3 and a lower section 4, secured together end to end. A rectangular box 5 is fixed centrally on the under side of the seat 2, and a s' ar box 6 is fixed centrally on the upper side of the base 1. The pedestal section 3 fits snugly within the box 5', and the pedestal section 4 fits snugly within the box 6. The pedestal section 4, comprises members 4 and 4 having longitudinal channels 4 and connected by dowel pins 4 When the members 4* and 4 are connected the channels 4 to gether form a longitudinal opening through the section ada ted to accommodate the bolt passing throug the seat, the pedestal and the base and connecting them together. The construction of the pedestal-section -3 is exactly the same as that of the pedestalsection 4. This construction of the pedestalsections admits of the use of smaller pieces of lumber than would otherwise be available for the purpose.

Front standards 7 and back standards 8 are secured on the seat 2. Horizontal arms 9 connect the standards 7 and 8 and the rear ends of. the arms extend rearwardly beyond the back standards 8, as shown. Cross pieces 10 connect the back standards 8. The bolt connecting together the seat, the

olt-section 12 and a lower section 13. The

socket 13 on the bolt-section 13 and having a square head 12 fittin in a mortise 2 in the seat 2. A wooden ug 2 fills the mortise 2 above the bolt head and is finished flush with the upper surface of the seat. The lower bolt-section 13 has at its u per end an enlargement 13 having a fema e screw matching the male screw of the bolt-section 12, and having at its lower end a screw threaded part 13*. A nut 14 screws onto the part 13 of the bolt 13.

In assembling the parts the bolt-section 12 will be inserted through the central hole in the seat 2; the lower end of the bolt section 12 will be screwed into the socket at the upper end of the bolt-section 13;-th e upper part of the pedestal section 3 will be inserted in the box 5 and the lower part of the pedestal section 4 will beinserted in the box 6, with the I throu h the hole 1 a at the center of the base 1. T e washer 15 will be placed on the lower part of the bolt section 13 and the nut 14 will be screwed on the threaded part 13 to draw together and securely connect the parts. Box shaped guides 16 are suitably secured on the under side of the base 1. Slides 17 having lengthwise slots 17 a are slidable in the guides 16. Bolts 18 fixed in the base 1 extend through the slots 17" and the slides slide on the bolts. Nuts 19 fit on the bolts 18. By loosening the nuts 19 the slides 17 may be slid outward or inward to edestal and the base, comprises an upper bolt-section 12 is an ordinary bolt threaded at its lower end to screw into a suitable part 13 extending downward in which it may be set on the bars.

' of said bolts.

cause the slides to project more or less beyond the base, as may be necessary to form a stable support for the chair. Casters 27 are connected with the slides 17 respectively. The crum tray is 'pivotally'supported on the rearwardly extending parts of the arms 9 and may be suspended in a vertical position as shown in Fig. 1, or may be turned on its pivots to occupy a horizontal position on top of the arms 9, as indicated by dotted lines in Fig. 1. The crumb tray comprises a bottom board 20 and side plates 20, and an end plate 2O secured on the said bottom board. Guide rails 21 of L-shaped cross section (Figs. 3 and 5) are secured in the angles formed by the board 20 and the side plates A saw cut 21, lengthwise of the central part of each uide rail 21, extends throu h the vertic member of the guide rail, a ong the central part of its len th, and se arates it, at that place, from the orizonta member of the guide rail. Thesaw cut 21 extends only part of the length of the guide rail and the members of the guide rail are not separated near the ends of the rail. Bolts 26 extend through the vertical members of the guide rails below the saw cuts 21 and when the nuts onthe bolts are tightened those parts of the vertical members of the uide rails below the saw cuts, being flexible y reason of their separation from the horizontal members of the guide rails, are pressed tightly against the faces of the bars 22 and bear thereon to hold the tray in any position Rec tangular bars 22 having longitudinal slots 22 fit and are slidable in the channels of the guide rails 21. The bars 22 have near their up er ends holes 22 accommodating the b0 ts 23 which connect the bars 22 with the arms 9. Thebolts 23 are threaded for part of their length, as shown in Fig. 8 and nuts 23 and 23 fit on the screw threaded arts Rectangular blocks 24 ave longitudinal holes 24 accommodating the bolts 23 and alsohave in their ends rectangular mortises 24 accommodating the nuts 23*. Washers 25 surround the bolts 23 between the ends of the blocks 24 and the sides of the bars 22.

In assemblin the arts the bolts 23 will be inserted throng the oles 22 in the bars 22; the washers 25 and the blocks 24 will be laced on the bolts 23 and the nuts 23 will e screwed onto the bolts until they stop against the non-threaded body of the bolts. T e ends of the bolts will then be inserted through-the holes 9 in the side rails 9 and the nuts 23 a will be screwed onto the bolts to firmly clamp the side rails between the nuts 23* and 23 and thereby connect the bolts 23 with the arms 9 so as to form a ri 'd support for the bars 22, the connection Teing such that the bars 22 may turn freel on the bolts. The crumb tray is slidable on the bars 22 and is connected therewith by bolts 26 which pass through holes (not shown) in the guide rails 21; through the slots 22 in the bars 22, and through holes (not shown) in the side plates 20 Washers 26 and thumb-nuts 26 =fit on the bolts 26. By loosening the nuts 26, the crumb-tray may be slid on the bars 22 and when the tray 1s placed in the desired position the nuts 26 may be tightened to hold it in position. In practice the crumb-tray will be adjusted only when it occupies its horizontal position and will then be moved inward oroutward on the bars 22 to place the tra in osition to suit the occuantof the chair an when the tray is so adusted the thumb-nuts 26 will be tightened to secure it in the position in which it is placed. 1 i

I have shown and described a crumb-tray mounted on bars 22 but it is obvious that a. flat top suitable for a writing table, a drawing board or cutting board may be substituted for the crumb tray, without departure from 'my invention.

The foot rest comprises hangers 29 of suitable construction, connected with the seat by screws 30 and supportin a foot board 29 fixed on said hangers. en the chair is used as a study chair the screws 30 will be taken out and the foot rest will be detached.

lower part of the pedestal section 3 in the box 6, wit the lower part of the bolt 12 extending through the central hole in the base 1; place the washer 15 and the nut 14 on the olt 12 and tighten the nut on the bolt to firmly secure the parts together, as shown in Fig. 4. The study chair being lower than the high chair, the basal support ofthe chair may be correspondingly contracted merely by loosening the nuts 19 on the bolts 18, and pushingl the slides 17 inward, and then tightening t e nuts to securethe parts in the position shown in Fig. 4.

In order to disconnect the crumb tray from the chair it is only necessary to remove the nuts 23 a from the bolts 23 and the bolts may then be pulled out of the holes 9 the arms 9 thereby detaching the bars 22 and the connected crumb tray. When the crumb tray is detached the holes 9 a are unsightly, I therefore provide wooden plugs 28 fitting in said. holes and having square heads completely hidin the holes.

Having ful y described my invention what I claim as new and desire to secure by Letters Patent is:

a base, a seat, a pedestal member connectible with said seat and in length suitable for a heat said base, both of said pedestalsections study chair, abolt section in length suitable and said seat to form a highchair. to extend through and connect said base, In Witness whereof Ihave hereunto signed pedestal section, and seat to form a study my name at Springfield, Illinois, this 17th 5 Thai!i1 a c0iinplenrlilengalf pedestal Isleci'lilon'bin day of October, 1908. I

ent eua tote ierencein eigt.e. twd en a study chair and a high chair and HAR BRITTON' a complemental bolt-section connectible to Witnesses: said first named bolt-section to form a bolt in W. H. THAIN,

10 length suitable to extend through and con--' W. J. AURELIUs. 

